I had that in the one who died today. Someone said it is albumin.it looks like a bunch of blood vessels in a jelly like substance. thank you so much for the corn starch tip. ahhhhhh!!!!!! it's falling out of the egg!!!!!!!!!!
At this point People say to leave it to get out of the last bit itself. See what happens if you give it a bit longer. It may still have the cord attached to the shell.